People & Partnerships

Selwyn District Council

Plant Choice

130,000 plants consisting of  Carex maorica, Carex secta (Canterbury), Carex virgata (Canterbury), Cyperus ustulatis (Canterbury), Juncus gregiflorus/ edgarii  (Canterbury), Juncus pallidus  (Canterbury), Apodasmia similis (Leptocarpus similus), Baumea articulata, Baumea rubiginosa, Bolboschoenus caldwellii (Marlborough), Eleocharis acuta, Juncus gregiflorus/ edgarii  (Canterbury), and Schoenoplectus tabernaemontani.

Innovation

Kauri Park were awarded the project due to their knowledge and experience of wetland species, its knowledge of biological treatment of storm water utilising wetland plant species, its experience in assisting other local councils throughout New Zealand in wastewater and storm water treatment, and due to the fact that it was the only nursery who could deliver the species and quantities within the specified time frame.

A unique feature of this project is a floating island wetland installed to give more surface coverage area for increased water treatment.

Kauri Park were awarded the project in November 2011 and supplied 130,000 plants in June 2012. The plants were delivered by seafreight from Onehunga to Lyttleton wharf in specially fitted out 40ft containers. This allowed us to deliver large quantities in the short time frame set aside for planting the wetland.

Planet & Eco-Leadership

Selwyn District Council (SDC) approached Kauri Park to design and build a 8ha storm water catchment system to provide for the demands of storm water treatment from the residential development that is occurring in the outlying suburbs of Christchurch city.

Kauri Park provided SDC with a design incorporating locally eco sourced native sedge and wetland species. Due to the scale and budget for this project, SDC were legally required to put the project out for tender. Kauri Park along with two local nurseries, tendered on the project.

One other significant environmental achievement was that the wetland was covered in snow for nearly one week post planting. The plants almost entirely survived this shock even though they had been grown in Northland prior to delivering to Christchurch. Now that the plants are established and acclimatised, there is little risk of plant failure.

Shared Success

The Lincoln wetland has established well and is beginning to do the job that it is designed for. It has the capabilities to treat large volumes of  storm water, it is environmentally friendly, low cost to maintain and readily renewable through natural multiplication of the wetland species used.

This project will be a green success.